Hand tube cutting apparatus



c. D. PALMER 2,734,267

HAND TUBE CUTTING APPARATUS Feb. 14, 1956 Filed March 17, 1954 FIG. I.

JNVENTOR. names a. PAL M672 .4 TI'ORNEX United States Patent HAND TUBE CUTTING APPARATUS Charles D. Palmer, Brooklyn, N. Y., assignor to C. D. Palmer Brass & Copper Co. Inc., Brooklyn,.N. Y., a corporation of New York Application March 17, 1954, Serial No. 416,847

1 Claim. (Cl. 30102) This invention relates to a tube cutting apparatus, and more particularly to a manually-operated hand tool for cutting thin walled metal tubes.

One object of the present invention is to provide a hand tool of the above nature having a single cutting wheel mounted on an adjustable channel shaped arm pivoted to the base of said tool, said base having three pairs of rollers for supporting said tube while the cutting tool is rotated around the tube.

A further object is to provide a manually-operated tube cutting tool of the above nature having a pivoted member normally nested in the channel of the cutter arm for smoothing the rough edges of the tube, after the cutting operation has been completed.

A further object is to provide a device of the above nature which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental in appearance, and very efficient and durable in use.

With these and other objects in View, there has been i1- lustrated on the accompanying drawing, one form in which the invention may conveniently be embodied in practice.

In the drawing,

Fig. 1 represents a top tool.

Fig. 2 is a side view of the same, showing in full lines the open position of the cutter arm, and in dotted lines the position of said arm for when cutting a tube.

Fi g. 3 is an end view of the same.

Referring now to the drawing, in which like reference numerals denote corresponding parts throughout the several views, the numeral 10 indicates the horizontal base of the hand tool having a pair of upwardly-extending side arms 11 and 12.

The side arms 11 and 12 are both provided with vertical rear edges 13 and inclined forward edge-s 14, as clearly shown in Fig. 2 of the drawing.

The rear of the base 10 is also provided with an inclined beveled section 15 for a purpose to be hereinafter more fully described.

Mounted within the side arms of the base is an elongated channel arm 16 having a central horizontal hollow rivet 17 passing through both of the sides thereof to serve as a pivotal connection with respect to said base.

The forward sections of the channel arm are inwardly ofl'set at 18 and 19 and rounded for embracing a cutting wheel 21 having a continuous beveled edge 22, which cutting wheel is mounted upon a headed screw 20, secured in place within said front oifset sections 18 and 19 by a nut 20a.

The side arms 11 and 12 are provided with three pairs of tube supporting rollers 23, 24; 25, 26; and 27, 28 journaled on a pair of parallel headed pins 29, 30 respectively.

The pairs of rollers 23, 24 and 27, 28 are located outplan view of the tube cutting side of the side arms 11 and 12, while the pair of rollers 25, 26 are located within said side arms.

In order to adjust the position of the cutting wheel 21, provision is made of a vertical rear adjusting screw 31, passing through a tapped aperture 33 in the bottom of the base 10 and having a rounded upper end 35 which is adapted to seat in a socket 34 formed in the base of the arm 16.

The screw 31 is provided at its lower end with a flat bottom manipulating handle 32, and provision is made of a nut 36 mounted upon the screw 31, and having its flat faces located within the sides of the arms 11 and 12 at the rear of the base 10.

A rectangular strip 37 having a pointed end 38 and a U-shaped end 39 is pivoted on the rivet 17 and serves to remove rough edges from the tube after it has been cut by this apparatus.

Operation In using the tube cutter, the flat handle 32 will be twisted to permit cutter 16 to swing around the pivot 17 in a counterclockwise direction until the space between said cutter and the supporting rollers is large enough to permit the insertion of the tube therewithin.

The handle 32 will then be tightened causing the cutter to move in a clockwise direction until it firmly engages the tube which is supported by the rollers. The tube cutting apparatus will then be twisted as a whole around the tube repeatedly until it is completely severed.

During this operation, if desired, the handle 32 may be twisted from time to time somewhat to tighten the cutter wheel slightly, so that it will feed into the tube as the cutting progresses.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only and that the invention is not to be limited to the specific disclosure, but may be modified and embodied in various other forms, without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claim.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

In a tube cutter, the combination of a base frame having a pair of side arms within which is pivotally mounted a channel member having a beveled cutting wheel at the forward end thereof, said base frame being provided with three pairs of aligned rollers, the central pair of said rollers being located beneath said cutting wheel, the other pairs of said rollers being located one on each side of said base frame for supporting the tube being cut at three points so as to provide a strong foundation therefor and insure more accurate cutting of the tube.

References Cited in the file of this patent UNITED STATES PATENTS 801,866 Headson Oct. 17, 1905 805,927 Minck Nov. 28, 1905 1,953,975 Phillis Apr. 10, 1934 1,977,441 Kenerson Oct. 16, 1934 2,300,139 Stein Oct. 27, 1942 2,557,737 Franck June 19, 1951 2,630,028 McIntosh Mar. 3, 1953 FOREIGN PATENTS 26,942 Sweden July 3, 1907 963,095 France Dec. 19, 1949 

